Posted by **zack** on Tuesday, January 31, 2012 at 10:03pm.

a group of 9 people spent $78 to go to the movies.adult tickets cost$10 each and student tickets cost $8 each.How many adult tickets were purchased?

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**PsyDAG**, Tuesday, January 31, 2012 at 10:35pm
Let x = adult tickets and y = student ones.

x = 9 - y

10x + 8y = 78

Substitute 9-y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation.

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**Lisa**, Wednesday, February 1, 2012 at 1:35pm
6 Student tickets X $8.00 = $48.00

$78.00 minus the $48.00 = $30.00

$30.00 divided by $10.00 Adult Cost = 3 adult tickets.

- math -
**Dillon**, Wednesday, September 11, 2013 at 6:12pm
3 adult tickets

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